improved form handling

improved profile editing
added activity editing

app/Resources/translations/messages.de.xliff

@@ -9,6 +9,14 @@
         <source>browser.title</source>
         <target>Kimai - Time Tracking</target>
       </trans-unit>
+      <trans-unit id="yes">
+        <source>yes</source>
+        <target>Ja</target>
+      </trans-unit>
+      <trans-unit id="no">
+        <source>no</source>
+        <target>Nein</target>
+      </trans-unit>
 
       <!--
         Login / Security
@@ -221,6 +229,10 @@
         <source>action.save</source>
         <target>Speichern</target>
       </trans-unit>
+      <trans-unit id="action.back">
+        <source>action.back</source>
+        <target>Zurück</target>
+      </trans-unit>
       <trans-unit id="action.updated_successfully">
         <source>action.updated_successfully</source>
         <target>Änderungen erfolgreich gespeichert</target>